/*******************************************************************************
 * Copyright 2017 Bstek
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.urule.parse;

import com.bstek.urule.model.library.Datatype;
import com.bstek.urule.model.library.constant.Constant;
import com.bstek.urule.model.library.constant.ConstantCategory;
import com.bstek.urule.model.library.constant.ConstantLibrary;
import org.dom4j.Element;

import java.util.ArrayList;
import java.util.List;

/**
 * @author Jacky.gao
 * @since 2014年12月23日
 */
public class ConstantLibraryParser implements Parser<ConstantLibrary> {
    public static final String BEAN_ID = "urule.constantLibraryParser";

    public ConstantLibrary parse(Element element) {
        List<ConstantCategory> categories = new ArrayList<ConstantCategory>();
        for (Object obj : element.elements()) {
            if (obj == null || !(obj instanceof Element)) {
                continue;
            }
            Element ele = (Element) obj;
            if (ele.getName().equals("category")) {
                categories.add(parseConstantCategory(ele));
            }
        }
        ConstantLibrary library = new ConstantLibrary();
        library.setCategories(categories);
        return library;
    }

    private ConstantCategory parseConstantCategory(Element element) {
        ConstantCategory category = new ConstantCategory();
        category.setName(element.attributeValue("name"));
        category.setLabel(element.attributeValue("label"));
        for (Object obj : element.elements()) {
            if (obj == null || !(obj instanceof Element)) {
                continue;
            }
            Element ele = (Element) obj;
            if (ele.getName().equals("constant")) {
                category.addConstant(parseConstant(ele));
            }
        }
        return category;
    }

    private Constant parseConstant(Element element) {
        Constant constant = new Constant();
        constant.setName(element.attributeValue("name"));
        constant.setLabel(element.attributeValue("label"));
        constant.setType(Datatype.valueOf(element.attributeValue("type")));
        return constant;
    }

    public boolean support(String name) {
        return name.equals("constant-library");
    }
}
